A mode converter which converts between a mode of a post-wall waveguide and a mode of a line in which a strip-shaped conductor is formed on another substrate different from a substrate of the post-wall waveguide, is less likely to cause a transmission failure resulting from a change in environmental temperature. A mode converter (10) includes: a post-wall waveguide (PW) in which an opening (121) is provided in a wide wall (conductor layer 12); a dielectric substrate (15) having a main surface on which a strip-shaped conductor (16) is formed; and a joining member (solder 18) joining the wide wall (conductor layer 12) and the substrate (15), wherein in a plan view, the opening (121) and the strip-shaped conductor (16) overlap each other.

Disclosed is a capacitive non-directional coupler having a non-directional coupler printed circuit board (PCB) and a capacitive attenuator. The non-directional coupler PCB includes a coupler section configured to carry energy travelling on a main transmission line. The non-directional coupler PCB and the capacitive attenuator are configured as a capacitive voltage divider, and provide a sample of the energy on the main transmission line. Also disclosed is a method for measuring for measuring RF power using an RF power sensor having the capacitive non-directional coupler that includes with the non-directional coupler printed circuit board and the capacitive attenuator. Also disclosed is an RF power metering system that includes an RF power sensor having the capacitive non-directional coupler.

A signal processing device may include a feeding apparatus having a first conductor configured to transmit a radio frequency signal; an insulating medium covering the first conductor; and a second conductor covering the insulating medium. The conductor may have first, second, and third portions. The third portion of the first conductor may be configured to be connected to the target apparatus to feed the radio frequency signal to the target apparatus and configured to form a capacitive impedance with the target apparatus, and the second portion of the first conductor may be configured to form an inductive impedance with the target apparatus. An absolute value of a sum of the capacitive impedance and the inductive impedance may be less than or equal to a preset impedance threshold.

A preferred embodiment of a plug connector for connecting a waveguide to at least one electric conductor may have a housing for connecting to the waveguide. Fastening means may be provided to attach the housing to a structure having the at least one electric conductor. The housing may accommodate a signal converter having an antenna arrangement. A waveguiding arrangement may be provided within the housing. The waveguiding arrangement may guide an electromagnetic wave into the waveguide and may be paired with the antenna arrangement. The signal converter may be connected to at least one electric conductor and may perform conversion between electric signals and high-frequency electromagnetic signals.

Disclosed herein is an apparatus that includes a memory, a processor, and a rectangular waveguide coupled to the memory and the processor so that the memory and the processor communicate with each other via the rectangular waveguide.

Base station antenna feed boards are provided. A base station antenna feed board includes a phase shifter and a hybrid radio frequency transmission line that is coupled to the phase shifter. The hybrid radio frequency transmission line includes a coplanar waveguide and a microstrip line. Related base station antennas are also provided.

Embodiments disclosed herein include an antenna assembly that includes a dual antenna support and isolation enhancer coupled to a first antenna element for isolating the first antenna element relative to a collocated, vertically-polarized antenna element. The dual antenna support and isolation enhancer can include tabs to support the first antenna element and shield a coaxial cable feeding the first antenna element, a base electrically connected to a shield of the coaxial cable for shorting to ground induced current on the shield of the coaxial cable, and, in some embodiments, at least one of a plurality of loading pins that can form a short-circuited LC resonator that can effectively open-circuit a gap of a coplanar strip transmission line that routes to a feed connection point of the first antenna element when vertically-polarized radiation is incident on the antenna assembly.

A Printed Circuit Board (PCB) and methods for manufacturing the PCB board are provided. The PCB includes a Radio Frequency (RF) signal transition at a RF signal pad. Multiple conductive layers other than a conductive signal layer of the PCB and conductive portions of the conductive signal layer not in electrical contact with a RF signal transmission trace have common ground connections forming a ground cage structure within the PCB around the RF signal pad and RF the signal transmission trace.

An adiabatic coaxial cable connector includes a chassis, and a planar transmission line within the chassis and having first and second ends. The coaxial cable connector further includes a first coaxial-to-planar transition within the chassis and connected to the first end of the planar transmission line, and a second coaxial-to-planar transition within the chassis and connected to the second end of the planar transmission line.

Aspects of coaxial to microstrip transitional housings are described. In one example, a transitional housing includes a channel comprising sidewalls formed into the housing, and an opening formed at an end of the channel. The transitional housing also includes a plug that is fitted into the opening at an end of the channel. The plug has a flat surface positioned at the end of the channel, extending between the sidewalls of the channel, and an undercut below the flat surface. The transitional housing also includes a coaxial conductor aperture that extends from outside the housing, into the housing, into the plug, through the flat surface and undercut of the plug, and into the channel. Use of the plug offers a manufacturing solution for the mechanical and electrical transition between a coaxial feedthrough to a PCB microstrip secured within the housing. The solution helps to eliminate unwanted mismatches of the transition.